Quick answers
- Where does Zachary J. O'Nell see patients?
- Medicare's clinician data lists 1 practice location in Murrieta, CA. Call before your visit to confirm the address.
- What is Zachary J. O'Nell's specialty?
- Medicare lists Nurse Practitioner as the primary specialty.
- Does Zachary J. O'Nell accept Medicare assignment?
- Yes. Medicare's clinician data says Zachary J. O'Nell accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- What is the phone number for Zachary J. O'Nell?
- (951) 397-4226, as listed in official Medicare / NPI Registry data.
- What is Zachary J. O'Nell's NPI number?
- 1972488872. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Practice locations
Addresses where Zachary J. O'Nell is enrolled with Medicare (CMS data updated 2026-10-02).
- 41880 Kalmia St, Suite 100Murrieta, CA 92562 (951) 397‑4226
Group practices
Medicare enrollment lists Zachary J. O'Nell as a member of this group (CMS data updated 2026-10-02).
- Southern California Urgent Care Network15 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in Murrieta
Clinicians with the same Medicare primary specialty in Murrieta, CA — not a recommendation.
Clinician information
| Credential | NP |
|---|---|
| Graduation year | 2025 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1972488872 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians